EN
Javan Hawk-eagle Nisaetus bartelsi



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(i) C2a(i); D1

Red List history
Year Category Criteria
2016 Endangered C2a(i)
2012 Endangered C2a(i)
2008 Endangered C2a(i)
2004 Endangered
2000 Endangered
1996 Endangered
1994 Endangered
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 126,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 300-500 medium estimated 2001
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) 10-19 - - -
Number of subpopulations 2-100 - - -
Largest subpopulations 1-89 - - -
Generation length (yrs) 18.5 - - -

Population justification: The population is estimated to number 600-900 individuals, roughly equating to 300-500 mature individuals, based on a 1:1 ratio of adults to juvenile and immature birds, as recorded in past studies (B. van Balen in litt. 2012).

Trend justification: This species is suspected to be in decline at a moderate rate, owing to on-going habitat loss and degradation in the face of human population growth, combined with capture for trade. Recent nest protection may have improved reproductive success, but the benefits accrued may have been countered by an apparent increase in trade of this species following its elevation to national bird.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Indonesia N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Indonesia Alas Purwo
Indonesia Baluran
Indonesia Dataran Tinggi Hyang
Indonesia Gunung Aseupan
Indonesia Gunung Bromo Tengger-Semeru
Indonesia Gunung Burangrang-Tangkuban Perahu
Indonesia Gunung Gede-Pangrango
Indonesia Gunung Halimun
Indonesia Gunung Ijen
Indonesia Gunung Karang
Indonesia Gunung Kawi-Kelud
Indonesia Gunung Liman-Wilis
Indonesia Gunung Malabar
Indonesia Gunung Masigit-Kareumbi
Indonesia Gunung Merapi
Indonesia Gunung Muria
Indonesia Gunung Pancar
Indonesia Gunung Papandayan-Kamojang
Indonesia Gunung Raung
Indonesia Gunung Salak
Indonesia Gunung Sawal
Indonesia Gunung Segara
Indonesia Gunung Slamet
Indonesia Gunung Tampomas
Indonesia Gunung Tilu-Simpang
Indonesia Gunung Unggaran
Indonesia Meru Betiri
Indonesia Pegunungan Dieng
Indonesia Rawa Danau
Indonesia Tahura R. Soerjo
Indonesia Telaga Warna-Cibulao
Indonesia Teluk Lenggasana-Pulau Sempu
Indonesia Ujung Kulon

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 0 - 2000 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines
Stresses
Reduced reproductive success, Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression - Trend Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Residential & commercial development Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - Non-trivial Recent

Recommended citation
BirdLife International (2017) Species factsheet: Nisaetus bartelsi. Downloaded from http://www.birdlife.org on 20/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/10/2017.